How to make a Random Layout when button clicked

Question

Actually i want to make it Random class but then i think to much activity can make the app slow so i just want to make Relative layout Random

so i have 5 layout in one activity class

layout1 = (RelativeLayout)findViewById(R.id.layout1);
layout2 = (RelativeLayout)findViewById(R.id.layout2);
layout3 = (RelativeLayout)findViewById(R.id.layout3);
layout4 = (RelativeLayout)findViewById(R.id.layout4);  
layout5 = (RelativeLayout)findViewById(R.id.layout5);

and in each layout there is the button in there to make layout random again

button.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v){ 

        //The code to how make layout random

        }
     });
 }

and then how to make layout that already opened not open again if the button random was pressed? then if all layout was already opened it will open new activity class

can anyone help me explain with give some example code of that?

Answer 1

Initially set visibility gone to all relative layouts and put all of them into View's ArrayList.

Get random number from 0 to List size.

Get View at random position and set its visibility to Visible and remove from ArrayList.

Do same thing until ArrayList is empty.

Create new activity when ArrayList is empty.

Code:

ArrayList<View> viewList=new ArrayList<>();
initLayouts(){
    layout1 = (RelativeLayout)findViewById(R.id.layout1);
    layout2 = (RelativeLayout)findViewById(R.id.layout2);
    layout3 = (RelativeLayout)findViewById(R.id.layout3);
    layout4 = (RelativeLayout)findViewById(R.id.layout4);
    layout5 = (RelativeLayout)findViewById(R.id.layout5);


    viewList.add(layout1);
    viewList.add(layout2);
    viewList.add(layout3);
    viewList.add(layout4);
    viewList.add(layout5);

    for(int i=0;i<viewList.size();i++){
        viewList.get(i).setVisibility(View.GONE);
    }

button.setOnClickListener(new View.OnClickListener() {

    public void onClick(View v){
        loadRandomLayout();
    }
});
}
public loadRandomLayout(){
    if(viewList.size()>0) {
        Random r = new Random();
        int number = r.nextInt(viewList.size());
        viewList.get(number).setVisibility(View.VISIBLE);
        viewList.remove(number);
    }else{
        startActivity(new Intent(this,NewActivity.class));
    }
}

Answer 2

You could create random int as follows:

//To get a Random number 1-5 (I saw your RelativeLayouts and you've 5
Random rand = new Random();
int randomNum = rand.nextInt((5 - 1) + 1) + 1;

And then you could create a method to choose what to show :

public void ShowRelativeLayout(int rand){

 switch(rand){
  case 1:
    if (layout1.getVisibility() == View.VISIBLE) {
     //Do nothing cause it's visible
     break;
 } else {
     layout1.setVisibility(View.VISIBLE);
     break;

 }
 case 2:
 ..........

}